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Lightboost Problem with XL2411T and general scan lines problem at 120 Hz

post #1 of 6
Thread Starter 
Hi,

I first bought the xl2411t for the purpose of 120/144Hz and Lightboost. So when Ive received it and tested it for a while, I first noticed that on 120 Hz refresh rate I have very barely visible horizontal scanlines. They are moving upwards the Screen and are barely visible, but they are still visible especially on dark Grey Backgrounds.

And the Problem is it only happens on 120 Hz, it doesnt happen on 144 Hz and 100 Hz. So then I tried lightboost with registry hack and this beta tool.

And the Problem is when I make vertical movements in Borderlands 2 for example I can see the vertical scanlines again but way clearer. The scanlines dont Show up when making horizontal Aimings however only when i make vertical aimings. The scanlines are very good visible in lightboost at both 120 Hz and 100 Hz and are very annoying. And they are visible across the whole Screen not just on the edges.


Now having said that- I went ahead and bought the Asus VQ248 basically to see if it also happens and maybe my GTX 660 Ti is the Problem. Turns out with the Asus I have no Problems at all, no visible scanlines at 120 Hz in normal mode and no scanlines in 100/120 Hz with lightboost. Also the lightboost obviously works better and the Image is more smooth.

So I wanted to ask you if you guys can check if you also have scanlines @ 120 Hz with xl2411t in normal Desktop mode, for example if you take a closer look at this Image from like 15cm distance:

http://i.imgur.com/uD2xe.jpg

You really have to concentrate and take a look at one area on the Screen to see those scanlines.


So its really annoying because the Benq has way like way better Colors than the Asus, both in the normal mode and lightboost, which has terrible Colors on Asus. And after testing a couple of games I do think that the Benq has better Motion sharpness than the Asus. Especially on 60 Hz the Benq has way better Motion sharpness That only matters if you also Play console games on your Monitor. But also on 120 Hz and 144 Hz the benq does provide slightly better Motion sharpness.

So I would rather like to Keep the Benq, but with the scanlines @ lightboost and normal mode @ 120 Hz its a no go really.
Edited by Stars - 6/17/13 at 3:53pm
post #2 of 6
^ Is that a screenshot? Because I am not seeing any "scan lines" and scan lines will not show up in a screen shot tongue.gif.

My BenQ XL2420T definitely does not have scan lines @ 120Hz. I ordered an open box Asus VG248QE and it had 1 small "scan line" at 120Hz & 144Hz.

My guess is that you just got a bad panel, return it saying that it was defective and that you want it to be replaced.
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post #3 of 6
Quote:
Originally Posted by Remmib View Post

My guess is that you just got a bad panel, return it saying that it was defective and that you want it to be replaced.
I believe so.
I have the XL2411T and it definitely does not have the scanlines issue. There's some faint appearance of stationary scanlines at the upper-right corner but it doesn't show up during motion. It's actually far clearer/cleaner of a LightBoost effect, much like the VG248QE. But the colors are crappy, like the VG248QE. Pink/crimson color, which I have to calibrate.

Return it and get it replaced. However, it *may* be the luck of the draw.
New drivers may allow better LightBoost colors.

Also, check out Lagom Inversion Pattern and figure out which pattern (letter) flickers the most. Use that as a diagnostic tool.
post #4 of 6
Thread Starter 
Thanks for your reply guys, thats what I suspect too, that the Monitor has some defect. Again with Asus everythings fine.

No ist not a screenshot ist type of Background where I notice those scanlines most clearly. It might be my graphics Card though Im afraid, but on the other hand it works fine and it also works fine with the Asus 248.

I tried with 2 different OSs (Windows 8 and 7) which have different Nvidia Drivers installed with the same result, so I rule out the OS and drives as the source of the Problem.

The benq xl2411t was made in December 12. Maybe I got a faulty one, Im thinking of replacing it through Benq itself, since the seller might not have a more recent Monitor made in 2013..

Well if you guys say that u have no noticable scanlines with lightboost then it must be a faulty xl2411. again in lightboost i see the scanlines when aiming up or down, not horizontally however. Ist all very weird but again it doesnt happen with Asus.

The Asus however has really bad Colors lightboost and even without. Benq is way better in that matter.
post #5 of 6
Good luck with BENQ -- the customer service at BENQ are a bit notorious -- but we should still support the vendors of 120Hz monitors, as we need to see 120Hz come to IPS displays.

Right now, PC-compatible 120Hz is slowly becoming available on some new HDTV's (often undocumented) -- True 120Hz from PC to TV. So 120Hz is slowly becoming a bit more common, but we need to keep nudging the monitor makers.
post #6 of 6
Thread Starter 
Here guys I made a Video of the scanlines. Its hard to catch it with iphone camera because firs of all the scanlines are barely visible and second- the iphone camera doesnt Keep up with fast Motion well.

Concentrate on the upper part of the Video on the Grey area and watch it in Fullscreen, maybe even few times. You should see thin, barely visible scanlines moving upwards the Screen.

Today Ive tried a different graphics Card and the Problem was still there with 120Hz. On 100 Hz and 144 Hz it doesnt appear.

Heres the original Video, if u use the VLC Player to watch it, rotate the Video under Tools, effects and filters, Video effects, Geometry, enable the "transform, rotate by 90 degrees"


https://docs.google.com/file/d/0Bybk_D1VKkIqazl2cko5bEw1c0E/edit?usp=sharing
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